Tech Team · Kintek Solution

To measure a leak, various methods can be employed depending on the type of leak and the environment in which it occurs. Here's a detailed explanation of several methods:

1. Smoke Generators (Smoke Bombs): This method is particularly effective for locating hard-to-find leaks. It involves using a smoke generator placed inside a cold furnace after all combustibles have been removed. When ignited, the smoke permeates through potential leaks, making them visible as the smoke escapes from the furnace.

2. Hydrogen Leak Monitor: This involves using an analyzer to detect hydrogen leaks in the ambient atmosphere. The system is calibrated to a level that is a quarter of the Lower Explosive Limit (LEL) for hydrogen (1% H2). An alarm can be set up to automatically shut off the source of the leak via a solenoid when a leak is detected.

3. Visual Inspection: A detailed visual inspection of the equipment can help locate the source of a leak. This includes checking connection points where gaskets join larger equipment sections to smaller subassemblies. Discoloration of paint or other signs of deterioration can indicate gaps in gaskets where leaks might occur.

4. Film (Soap Bubble) Leak Detection: This method is straightforward and quick for detecting high-pressure inert gas leaks. A leak-indicating liquid is sprayed onto suspect areas, and if bubbles form, a leak is confirmed.

5. Vacuum Leak Detection: This method is more precise and involves isolating the liquid nitrogen or liquid argon storage system from the vacuum furnace. The system is then evacuated to create a vacuum state. A helium mass spectrometer is used to detect leaks in the system. This process requires careful steps, including disconnecting the external gas system, evacuating the furnace, depressurizing the storage tank, and using experienced personnel to operate the system safely.

6. Preventive Measures: To prevent air and gas leaks, it is crucial to ensure the flatness of end faces and sealing surfaces of vacuum chambers. Additionally, testing the airtightness of gas flow systems, including flange installations, and purging these systems with inert gases can help prevent leaks.

Each of these methods serves a specific purpose and can be chosen based on the nature of the leak and the environment in which it occurs. Proper maintenance and regular checks can also help in early detection and prevention of leaks.

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